CAWI (Computer Assisted Web Interviewing) is an online methodology that allows to interview in a very short time a really wide sample of respondents, which, in many case, are also statistically relevant. Through this type of survey we can reach general population (i.e.: inhabitants of a country in Europe or in the World, employees of a company, etc.), but, thanks to online panels, also specific groups with set prerequisites (i.e.: owners of specific types of product/object, people with peculiar familiar conditions or health status, etc.). Online interviews allow to share with the respondents multimedia stimuli (images, videos, links, etc.) related to your products and services or to the competition’s ones, with the purpose of obtaining direct and spontaneous information. Moreover, being CAWI a methodology that leverages the web, independently from the width of the sample, it guarantees effectiveness in the fieldwork and in evidence collection, but also costs and timing optimization.